Packing-ring compressor sleeve



' W. HUFQLBUT l PACKING RING COlz/IPRESIMH SLEEVE Filed June 23, 192]mvemp Zwam Patented eb. 17, 1925x ,UNITEDv SiliifissA oFFicE.

WATSON HURLBURT, OF CHICAGO, ILLINOIS.

PACKING-RING COMPRESSOR SLEVE. 1

Appiicanon ined Jane 23,

To all whom t may concem: f

Be it known that I, WATSON HURLBURT a citizen of the United States,residing at Chicago, in the State, of Illinois and county of Cook, haveinvented a new and useful Improvement in Packing-Ring Compressor ingreleased from the cylinder walls by ren ioval for repairs orotherwise,and it is den sired to return the piston to the cylinder.

The principal objects of my invention are':'-First, to provide a liandvattachment to'reduce the diameter of a piston ring to .enable a personto insert a piston with its ring, into the cylinder. Second, to reducethe manufacturing costs without sacricing its efficiency. Third, themeans used for pulling the ends of the sleeve together being applicableto all sized sleeves used for different diameters vof pistons. Fourth,the construction being such that all the parts stay together when not inuse. l

Various devices have been used for coinpressing the rings with more orless success, some being limited in their use on pistons inserted fromthe top only, while others can be used both top and bottom, but theusual construction is costly, involving an over amount of manual labor,this being necessitated by the manner of construction and the principlesinvolved.

I have evolved a construction eliminating much hand-work, substitutingtherefor the punch press' and the use of forming dies. Generallyspeaking it consists of an open sheet metal sleeve, of a widthsuilicient to cover a predetermined number of rings vand of a. lengththat will completely encircle the piston, when the packing rings are intheir working position. The ends of this sleeve are formed into hooks bywhich I lam enabled to dra-w the parts together by the iiiipingement ofmy buttresses inthe throat of the hooks, the drawing'together of whichmay be accomplished by means of a threaded screw and thumb nut, or otherdesirable device. My buttresses are punched froirihia e body of one ofthe long sides being beveled at a less angle than that of the hooks, and

fformed into a thin, narrow rounded edge 192i. seriali No. 479,881.

which may have a hinge action, accommo' dating itself to the varyingpositions of the y hooks, By this formation all the compressive force isexerted on the long and narrow area, and may be no wider than thediameter of the body of a pin; thus I can apply the pulling force closeto the surface of the compressor sleeve and reduce to a minimum theleverage tending to stnaighten out the hookformed at the end of thesheet metal ring, otherwise called the compressor sleeve.

By thus shortening the leverage at the point of application of theforce, a hook may be formed with la .slightly rounded throat and bentstraight back to form an acute ,angle with the body of the ring,requiring no additional reenforcement, and enabling me to use acomparatively thin piece of metal in one continuous piece withoutfurther support by riveting or welding. By making the middle portion ofone of the hooks longer and outstanding from the body of the ring, atpractically and forming an elongated .hole therein, I at once form anear, the purpose of which is to retain the screw with its buttresses andnuts from being lost, when this means is used for drawing the endstogether, the ear taking no .part in the straining action from thecompressure, and to give it more stability, I form a flange around ltheouter edge standing noi mally to the plane of the ear. A narrow space at'the center of the other hook may. be cut away to allow the outstandingportion of its buttressto pass therethrough. One

edge-of the sleeve is given a slight outward Hare to prevent the thinmetal fro'm entering the cylinder between that andthe piston.

In using this sleeve I proceed as follows: having inserted all the ringsin their respective slots in the piston'preparatory to in serting it in`the cylinder, the sleeve is slipped on over all the rings, theoutwardly curved edge of said sleevc even with the top of the piston,one buttress is slipped on the threaded screw and the screw inserted inthe obloii hole of the upstanding ear, then` the secon buttress isslipped on, the nar row edge of these two facing each other.

Next the thumb nut is started on the screw, and while'oiie handgraspsthe sleeve encircling the piston, the buttresses are guided -into thecorresponding hooks on the sleeve the ends f the sleeve together, umsredneing the diameter of .the rings until they will pass into thecylinder by pushing the piston through the sleeve, the flaring end ofwhich acts as a Stop to prevent its ingress between the cylinder walland the body of the piston.

I do not wish to be limited .to theexact detailsy of constructionherewith shown, as' various deviations from that illustrated would notdepart frm the spirit of my invention.v p y The preferred constructionas outlined 1nA my invention, is illustrated in the accompanyingdrawings in which Fig. 1 illustrates a compressor sleeve. with vitslattachments for forcing 'the ends to gether, through the medium of thebuttresse'sv channel 6, to accommodate the screw 2, form the ends 'ofthe sleeve.

the connection between the said screw and The reduced thickness of thebuttress at the edge, leasily enter the hooks'and lie against the throat9, andl being of a less angle than said hooks, a hinge action isobtainable, conforming to varying angles produced atvdifi'erentdistances apart ofj the hooks 8. The upstanding ear 10, in the sleeve 1,and occupying a middle position between the hooks 8, has an'elongatedhole 11, through which the screw '2, 'works and servesthe sole purposeof retaining said screw and other parts when not in use. To 'strengthenthis ear the edges are flanged as at 12 and form a continuous line withthe hooks 8, as at 13. The part 5, ofthe buttress 3, occupies the recessthus formed by the flange 12, of the ear .10. The body ofy the piston14, with the rings 15, are com ressed into their variousv slots 16, bythe orce of the 'sleeve 1, as shown in Fig. 4.

I The force exrted by screwing on-the nut 4,

acts on the buttresses 3. in the direction of the arrow ln'Flg. 2, whichis in line of the greatest resistance, and I am enabled to use acomparatively thin piece of metal in formf ing the buttresses, and bymaking close contact as at'17, the two leaves of the buttress tend toreinforce each other.

-I claim 1'. Ina packing ring compressor sleeve the combination of anopen thin metal sleeve, hooks formed on the parallel edges thereof, andopening away from each other, adjustable, detachable. buttresses aportion 4of which may be interlocked with the beforementioned hooks andan adjustable member l designed to interact with the buttresses inforclng the ends of the sleeve towards each other to reduce .theinternal diameter.

2. In a packing ring compressor sleeve the combination of an open thinmetal sleeve the .ends of which are designed to be drawn to.

gether to reduce theinternaldiameter, hooks formed from the main body of'said sleeve the plane of said'hooks being normal to .the plane of saidsleeve and bent at an acute angle from -the main body, buttresses of alength conformingto that of the hooks and intended to` engage said hooksand means for retaining the buttresses 'and forcing them toward eachother while engaging the" 'hooks ofthe compressor sleeve, all and forthe purposes for which it is designed.

3. In a packing ring 'compressor sleeve l the combination of an openthinmetal sleeve the ends of which are designed vto be drawn together toreduce the internal diameter, hooks formed from the main body of thesleeve designed to retain a member -'capable of forcing the twotowardseach other, a

portion of one hook being longer than 4the ing and normal to the body ofthe sleeve and having a hole therein forret'aining purposes.

4. In a'packing ring vcompressor slee e the combination of an open thinmeta-l s eeve, hooks formed onv the parallel edges of said sleeveopening away vfrom each other, buttresses, oneedge of each being beveledat a less angle than the hooks and designed to engage the beforementioned hooks, the major portion of said buttr'esses upstanding' fromits engaging edge, and a channel formed therein to accommodate anothermember and. conforming to the shape of such member whereby said memberinteracts with saidv buttresses, interlocked with'sai'd hooks,` to 110draw the ends of the sleeve together -to're- 'remaining portion formingan ear outstandduce the internal diameter asand for the purposesspecified.

wATsoN HURLBURT.

